6403406422561 has 48 divisors (see below), whose sum is σ = 6895937309184. Its totient is φ = 5944475344896.

The previous prime is 6403406422549. The next prime is 6403406422601. The reversal of 6403406422561 is 1652246043046.

It is not a de Polignac number, because 6403406422561 - 2²⁹ = 6402869551649 is a prime.

It is a super-2 number, since 2×6403406422561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6403406422541) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3935713030 + ... + 3935714656.

It is an arithmetic number, because the mean of its divisors is an integer number (143665360608).

Almost surely, 2^{6403406422561} is an apocalyptic number.

It is an amenable number.

6403406422561 is a deficient number, since it is larger than the sum of its proper divisors (492530886623).

6403406422561 is a wasteful number, since it uses less digits than its factorization.

6403406422561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2410 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 6403406422561 in words is "six trillion, four hundred three billion, four hundred six million, four hundred twenty-two thousand, five hundred sixty-one".